/**
* Init checkpoints data file.
*
* We'd like to store them separately, because in some scenarios patches
* may be run simultanously. E.g.
* 1. Run patch B without success - checkpoint file is left
* 2. Create patch A (before B)
* 3. Running patch A could overwrite B's checkpoints.
* That's the reason why patch id is in the filename
*/
private function init_checkpoints()
{
$dir = rtrim(DATA_DIR, '/\\') . '/patch_' . $this->get_identifier();
self::$checkpoints_dir = $dir;
if (file_exists($dir)) {
if (!is_dir($dir)) {
throw new ErrorException('Cannot create patch checkpoints dir');
}
} else {
mkdir($dir);
}
}
